Stoker mechanism



STOKER MECIIANTSM Filed July 15. 1920 A! TORNLY Patented Oct. 21, 19274.

UNITED STATES mariani"orf1=ic1: .a1

OTTO ARAM, OF ESSINGTON, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE'ELEC- TRIC `AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLV'ANIA. 'l l s'roxim niiicrmivisizr. n

Application led July 15, 1920. Seria'l No'. 396,359.

To all whom t may concern:k

Beit known that I, O'r'ro ARAM, a citizen ofthe United States, and a residentof4 Essington, in the county of Delaware and State of Pennsylvania, have invented a new and useful Improvement in Stoker Mechanism, of which the following is a specification. c

This invention relates to stokers, and particularly to the mechanism for driving and controlling the movement of reciprocating rams, gratos and agitators employed therein, and it has for an object the provision of a simple andA durable driving lconnection between the main ramdriving mechanism and the secondary rams or moving grates commonly used in underfeed stokers. Another object is to produce a driving connection requiring a minimum amountof machine work, and which may be readily assembled or readily replaced without material disturbance to the other parts of the ap-r paratus.

These and other objects are attained by means of stoker mechanismembodying the features herein described and illustrated in the drawings accompanying and forming a,

part hereof, wherein:

Fig. 1 is a vertical longitudinal sectionr through a Stoker embodying the features of my invention. v

Fig. 2 is a plan view of the driving connections showing the plunger in horizontal section. y

Referring to the drawing, the Stokerv to which the improved apparatus is applied, as shown, includes the usual fuel hopper 5 and ram 6 which is reciprocated beneath the fuel discharge opening 7 for the purpose of forc-A ing fuel into the longitudinally extending retorts 8. It will be understood thatthe StokerA may be provided with any desired number of retorts, each having fuel-feeding and agitating mechanism similar to that ilof the underfeed type which is'rwell known in the art. This invention is principallyI concerned with an improved means for connecting the various rams and fuel agitators with the driving mechanism and these means include the usual crank shaft 13 disposed opposite the end of the ram 6.y The crankshaft 13 and tlie ram 6 are operatively connected by a rod 14 which is adapted to impart reciprocating motion to theram when the crank shaft is rotated. The connecting rod 14 is provided intermediate its ends with a vertical slot 15 whichcis adapted to receive the upper end 1,6 ofan operating lever 17 which is pivoted y' iipon a shaft 18 disposed beneath the fuel hopper. 19 of the lever 17 is connected with the secondary ramy 10 by means of the b ar 12, and it will .be seen that when the lever 17 is oscillated, reciprocatory motion isI iinparted to the rain. "Theunderside of the plunger 6 is provided L,with fa longitudinal slot 20v which registersv with a similar slot 21 provided in the bottom of the hopper casting 5. LTheseslots are provided yfor the purpose ofv permitting free movement lof the lever 17 into the position indicated at A in dotted and dash lines. `The rodl4 is free to move vertically with respect tothe lever 17 by reason of the sliding engagement ofthe lever with the rod and, therefore, when the crank shaft isy rotated, the plunger 6 will be reciprocated and theflever 17 oscillated.` When the fuelfeeding ram 6 is moved rearward by the rod 14, the saine movement of the rod will cause the secondary ram connected to the lever 17 to be moved forward. Thus, it will be seen that the ram 6 and the secondary ram always move iii opposite directions, a featurev of manipulation which has certain The lower end well known advantages in causing proper distribution of the fuel.

No machine work is required for the slid-v ing connection of the lever 17 with the rod 14, because the slot 15 may be formed when the rod 14 is cast or forged, as the case may be, and no finish. is required for the end of the'lever which operates iii the slot as it is desirable that there be suiicient lost motion between the-parts to permit free relative movement thereof.

While I have shown the driving apparatus in connection with the secondary ram of an uiiderfeed stoker, it is obvious that the apparatus may be employed to, operate moving grates vor rams of stokei's of any type employing such moving parts.

While I have described .and illustrated but .one embodimentA of my invention, it will be` l. Stoker mechanism'comprising a fuel` feeding element, a fuel ram' mounted for reciprocation in Vsaid fuel feeding element, a fuel agitating member, a rotary crank shaft, a connecting rod pivotally connected to the ram and crank shaft whereby rotary movementof the crank shaft imparts reiprocatory movement to the ram, the said r l being provided with a vertical slot, a rocking leverl fulcrumed at an intermediate pointy having one end projecting into the slot whereby the operation of the said lrod imparts oscillatory movement to the said rocking lever, and means connecting the other end of rocking lever with the said fuel agitating member,`

2. Stoker mechanismy comprising a` fuelv feeding element, 'a main fuel ram mounted for reciprocation in said yfuel feeding ele ment, a fuel agitating member, a rotary' crank shaft, a connecting rod pivotally connected to the ram and crank shaft, whereby rotary movement of the crank shaft imparts reciprocatory movement to the ram, the said rod being provided with a slot intermediate the points of connection of the rod' with the ram and crank shaft, a rocking lever pivoted beneath the axis of the ram at an intermediate point and having its upper end projecting into the slot whereby the operation of thepsaid rod imparts oscillatory movement tothe said rocking lever, and means connecting the lower end of the said rocking lever with the said fuel agitating member.

3." Stoker mechanismcomprising a fuel feeding element, a fuel ram mounted for reciprocation in said fuel feeding element, a fuel agitating member, a rotary crank shaft,

vra connecting rod pivotally connected to the 4.]Stoker mechanism comprising a fuel'V feeding element, a main fuel ram mounted forreciprocation in said fuel feeding element, `a fuel' agitating member, a rotary.

crank-shaft, a connecting rod pivotally connected tothe ram and crank-shaft, whereby rotary movement of the 'crank-,shaft imparts reciprocatory movement to the ram, .the said rod being provided with a slot intermediate the points of connection of the rod with. they ram and crank-shaft, a rocking lever piv-k oted intermediate its ends beneath the axis ofthe ram and having its upper end projecting into the slot whereby the operation of said rod imparts oscillatory movement to the rocking lever, and means connecting the lowerend ofthe saidV rockinglever with said fuel agitating member, whereby the reciproatOry movement imparted to the fuelagitating member is opposite in direction to that imparted to the mainfuel ram.

In testimony whereof, I have hereunto subscribed my name this 9th day of July,

OTTO ARAM. 

